This is an interesting idea!
Took a quick look at pricing, looks to be about 100/mo for a weekly call (so about $25/call).
Yet the person making the call gets paid $12. That seems like quite a markup (and is easily seen by users).
A portion of this is probably taken up by the humans doing the matching. Folks will probably tell you to better hide this cost, but maybe you could just be transparent and tell the users?